The US's railroad network is made up of around 140,000 miles of track, but many of our trains are slow and outdated. Over the last couple of decades, countries like China, Japan, the UK ...

For many years, the Garabit Viaduct remained the tallest bridge in the world. The single railroad track crosses the Garabit Valley, 400 feet above the Truyere River. That’s half as high as the ...